Mirrors By: Bailey Griggs and Katie Kennedy

• Mirrorso Distinguish between Concave and

Convex mirrors.o Describe a simple ray diagram.o Distinguish between real and virtual

images.

Objectives

• Types of Mirrorso Convexo Concaveo Sphericalo Parabolic

• Convex Mirrorso How light reflectso Examples

Mirrors Outline

• Concaveo How light reflectso Examples

• Simple Ray Diagramo Explanation and Examples

• Real vs. Virtual Imageso Real Images o Virtual Images

• Demonstrations• Evaluation Questions

Mirrors

We are going to explore how

concave and convex mirrors work along with describing the simple ray diagrams that go along with each one. We will also discuss the real and/or virtual images that both of these mirrors produce.

Convex

Concave

Spherical

Parabolic

Different Types of Mirrors

Straight or Plane mirror

Concave

• Reflection

• Curved inward reflective surface

• Used to magnify

• Produces Real and Virtual Imageso depend on object’s distance from the

surface of the mirror and the focal length.

Concave

Convex

• Reflection

• Image is small or reduced in size

• Image is upright

• Image is located behind the convex mirror

• Image is always virtual

Convex

Convex- smaller image

Concave- magnified image

Simple Ray Diagram

• Tool used to determineo locationo sizeo orientationo type of image formed

• Real or Virtual

• Straight/ Plane mirror

• Extended Reflected Rays make up image

• Behind the mirror

Simple Ray Diagram for Concave Mirrors

Whether the image is upside-down or rightside up depends of the distance you are from the mirror

and the focal length of each mirror.

Simple Ray Diagram for Convex Mirrors

• Virtual imageo Object is less than the focal length of the mirroro Can only be seen by looking at the mirror, not

projected• Real Image

o object is further than focal length of mirroro Can be projected and everyone in the room can look

at it

Real vs. Virtual Images

Demonstration Time!

Evaluation Questions

Which mirror produces an image behind the mirror, Concave or

Convex?

Convex

Evaluation Question #1

True or False: Concave mirrors are used to magnify images.

True

Evaluation Question #2

A _____________ mirror takes a large space and makes it small.

Convex

Evaluation Question #3

An image that is produced that is less than the focal length of the mirror is

a ______________ image.

Virtual

Evaluation Question #4

A ______________ image can be projected.

Real

Evaluation Question #5

Label the diagram with Concave or Convex with the correct image.

Evaluation Question #6

Concave Mirror Convex Mirror

The point at which the extensions of the reflected rays intersect is the

_________ of the image being produced.

a. Bottomb. Topc. Center

Evaluation Question #7

Concave mirrors produce:

a. Real Imagesb. Virtual Imagesc. Both

Evaluation Question #8

Flinn, G. (n.d.). HowStuffWorks "Types of Mirrors". HowStuffWorks "Science". Retrieved October 21, 2013, from http://science.howstuffworks.com/innovation/everyday-innovations/mirror3.htm

Flinn, G. (n.d.). HowStuffWorks "Types of Mirrors". HowStuffWorks "Science". Retrieved October 21, 2013, from http://science.howstuffworks.com/innovation/everyday-innovations/mirror3.htm

Henderson, T. (n.d.). Reflection and Image Formation for Convex Mirrors. The Physics Classroom. Retrieved October 21, 2013, from http://www.physicsclassroom.com/class/refln/u13l4a.cfm

Hewitt, P. G. (2002). Conceptual physics: the high school physics program. Needham, Mass.: Prentice Hall.

Moore, C. (n.d.). Concave and Convex Mirrors. More House. Retrieved October 18, 2013, from https://www.morehouse.edu/facstaff/cmoor

Bibliography